Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler"

pkg/compiler/lib/src/js_emitter/class_stub_generator.dart

-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of dart2js.js_emitter;
-
-class ClassStubGenerator {
-  final Namer namer;
-  final Compiler compiler;
-  final JavaScriptBackend backend;
-
-  ClassStubGenerator(this.compiler, this.namer, this.backend);
-
-  jsAst.Expression generateClassConstructor(ClassElement classElement,
-                                            Iterable<String> fields) {
-    // TODO(sra): Implement placeholders in VariableDeclaration position:
-    //
-    //     String constructorName = namer.getNameOfClass(classElement);
-    //     return js.statement('function #(#) { #; }',
-    //        [ constructorName, fields,
-    //            fields.map(
-    //                (name) => js('this.# = #', [name, name]))]));
-    return js('function(#) { #; }',
-        [fields,
-         fields.map((name) => js('this.# = #', [name, name]))]);
-  }
-
-  jsAst.Expression generateGetter(Element member, String fieldName) {
-    ClassElement cls = member.enclosingClass;
-    String receiver = backend.isInterceptorClass(cls) ? 'receiver' : 'this';
-    List<String> args = backend.isInterceptedMethod(member) ? ['receiver'] : [];
-    return js('function(#) { return #.# }', [args, receiver, fieldName]);
-  }
-
-  jsAst.Expression generateSetter(Element member, String fieldName) {
-    ClassElement cls = member.enclosingClass;
-    String receiver = backend.isInterceptorClass(cls) ? 'receiver' : 'this';
-    List<String> args = backend.isInterceptedMethod(member) ? ['receiver'] : [];
-    // TODO(floitsch): remove 'return'?
-    return js('function(#, v) { return #.# = v; }',
-        [args, receiver, fieldName]);
-  }
-}